drm/i915/dp: Use a mode's crtc_clock vs. clock during state computation

The encoder state computation should use the
drm_display_mode::crtc_clock member, instead of the clock member, the
former one possibly having a necessary adjustment wrt. to the latter
due to driver specific constraints. In practice the two values should
not differ at spots changed in this patch, since only MSO and 3D modes
would make them different, neither MSO or 3D relevant here, but still
use the expected crtc_clock version for consistency.

Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20251215192357.172201-6-imre.deak@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 052cc0df0121991caf96f58c4dc2a29686eb4f09..e687d61ff49c38e29994ec8694dee0340e261f3b 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2051,7 +2051,8 @@ static int dsc_compute_link_config(struct intel_dp *intel_dp,
                                        continue;
                        } else {
                                if (!is_bw_sufficient_for_dsc_config(dsc_bpp_x16, link_rate,
-                                                                    lane_count, adjusted_mode->clock,
+                                                                    lane_count,
+                                                                    adjusted_mode->crtc_clock,
                                                                     pipe_config->output_format,
                                                                     timeslots))
                                        continue;
@@ -2212,7 +2213,7 @@ static int dsc_compute_compressed_bpp(struct intel_dp *intel_dp,
        int bpp_x16;
        int ret;
 
-       dsc_joiner_max_bpp = get_max_compressed_bpp_with_joiner(display, adjusted_mode->clock,
+       dsc_joiner_max_bpp = get_max_compressed_bpp_with_joiner(display, adjusted_mode->crtc_clock,
                                                                adjusted_mode->hdisplay,
                                                                num_joined_pipes);
        max_bpp_x16 = min(fxp_q4_from_int(dsc_joiner_max_bpp), limits->link.max_bpp_x16);